package com.blog.config;

import com.blog.filter.JwtAuthenticationTokenFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

	@Autowired
	private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

	@Autowired
	private AuthenticationEntryPoint authenticationEntryPoint;

	@Autowired
	private AccessDeniedHandler accessDeniedHandler;
	@Override
	@Bean
	public AuthenticationManager authenticationManagerBean() throws Exception {
		return super.authenticationManagerBean();
	}



	protected void configure(HttpSecurity http) throws Exception {
		http
				//关闭csrf
				.csrf().disable()
				//不通过Session获取SecurityContext

				.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
				.and()
				.authorizeRequests()
				// 对于登录接口 允许匿名访问
				.antMatchers("/user/login").anonymous()
				// 除上面外的所有请求全部需要认证访问
				.anyRequest().authenticated();
		//配置异常处理器
		http.exceptionHandling()
						.authenticationEntryPoint(authenticationEntryPoint)
						.accessDeniedHandler(accessDeniedHandler);
		//关闭springsecurity默认的退出登录接口
		http.logout().disable();
		//把jwtAuthenticationTokenFilter添加到SpringSecurity的过滤器链中
		http.addFilterBefore(jwtAuthenticationTokenFilter,
				UsernamePasswordAuthenticationFilter.class);
		//允许跨域
		http.cors();
	}
	@Bean
	public PasswordEncoder passwordEncoder(){
		return new BCryptPasswordEncoder();
	}
}
